Frame transformation theory and the classification of rotational spectra of diatomic molecules according to the five Hund cases provide a guide to the quantum-mechanical formulation of alternative coupling schemes for the treatment of atomic collisions between species carrying spin and electronic angular momenta. An account of the corresponding diabatic representations of the orthogonal transformations among cases and of extensions needed to deal with molecular encounters is presented. Basic to these developments are the tools of angular momentum algebra, and in particular the limiting relationships known as semiclassical limits. Alternative representations for the quantum-mechanical scattering matrix are discussed with reference to the description of steric effects in molecular collisions.
Angular momentum coupling schemes for molecular collisions: the stereodirected representation
AQUILANTI, Vincenzo;CAVALLI, Simonetta;
2000
Abstract
Frame transformation theory and the classification of rotational spectra of diatomic molecules according to the five Hund cases provide a guide to the quantum-mechanical formulation of alternative coupling schemes for the treatment of atomic collisions between species carrying spin and electronic angular momenta. An account of the corresponding diabatic representations of the orthogonal transformations among cases and of extensions needed to deal with molecular encounters is presented. Basic to these developments are the tools of angular momentum algebra, and in particular the limiting relationships known as semiclassical limits. Alternative representations for the quantum-mechanical scattering matrix are discussed with reference to the description of steric effects in molecular collisions.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
